Carburetor



. Patented Nov. 16, 1926.

f UNITED smras SEBASTIAN G. BRINKMANQOF PERTH AMBOY, NW JERSEY.

' CARBURETOR. I

Application iled March 24, 1923. Serial No. 627,356.

This invention relates to improvements in carburetors and more particularly to an 1mprovement -upon the carburetor illustrated and described in my Letters Patent No.

5 1,243,250, dated October 1ct-h, 1917.

An object of the invention is to provide -a carburetor with an annular fuel discharge nozzle and a double conical-shaped governor, rotatably mounted upon a coarse screwthreaded spindle, said governor being capable of upward and downward movement axially past said nozzle. and directly operable in accordance'with the speed of the engine toY whichV the carburetor is attached.

A further object of the invention is to provide a carburetor with an annular f fiel discharge nozzle, and a tapered metering cone threaded into the base of the. carburetor bod the same being operable from a point adjacent thesteering mechanism, and adapted to meter the f uel drawn through the carburetor by the suction of the engine.

A still further object ofthe invention is -to provide4 acarburetor having a widened or fiared annular fuel discharge nozzle andan annular fuel supply chamber, between which is formedga restricted annular fuel inlet. A

considerable partial vacuum is maintainedin this widened fuel discharge nozzle and when the liquid fuel enters such discharge nozzle from the restricted inlet a portion of same is vaporized therein'and a mixture of vapor'and unvaporized fuel particles issues from such nozzle into the main air stream, where such unvaporized particles are fur- 'ther broken up.

Other objects will appear as the description proceeds.

Inthe accompanying drawings whichV 40 form 'a part of my application,

Figure 1 is a sectional elevation taken through my impraved carburetor;

Figure 2 is a--sectional view taken on the line 2-'2 of Figure 1, and Figure 3 is an enlarged sectional detailed view of a portion of one side of the fuel chamber, metering cone, and adjacent parts. Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts. The body of my improved carburetor is expanded at 1, and is formed at its lower end with an outwardly flared skirt portion 2. 5l The upper end of the carburetor is slightly restricted at 3, where it is adapted to be at- .of an internal combustion engine..

,at the lower en d of the expanded portion l,

where such portion joins the skirt portion 2 of the body. Cooperating with this flange is an inwardly extending lip on a tapered metering cone 6, which is adjustable'relative to the .skirt portion 2 in a manner hereinafter set forth, to control the flow of fuel, and in all positions of adjustment of the ele'- ment 6 the said lip is spaced from the-flange 5 to form therebetween an enlarged or flared v'chamber' which constitutes the fuel nozzle and functions in a manner hereinafter set forth.

The outer wall of the hollow metering cone 6 is tapered at substantially 80 degreesv to the horizontal, which is substantially the taper ofthe inner wallof the skirt portion 2. The space between these walls forms an annular fuel inlet passage', the cross-sectional area of which is adjusted by movement of the metering cone relative to the body portion. To permit movement of the cone 6, the'latter is externally screw-threaded as at 7 adjacent its lower end where it engages the internal screw thread on ,the

skirt portion 2 of the carburetor body. A laterally extending arm 8 is formed at the lower end o f the cone 6 and has connected thereto a rod 9 which is adapted to extend -to the dash of an automobile or other point convenient to the operator. There are approximately thirty threads to the inch on the base of the element G,l so that the element can be adjusted througlivery small vertical distances with correspondingly small variations in the cross-sectional area of the fuel vice is assembled, being held in position by;

the nut 13, as indicated in Figures 1 and 3.

A -choke valve ll? of ordinary type Vis provided in the air inletto control the flow of incoming air in the usual way.

. Extending thrrmgh the wall of the air inlet pipe and, projecting vertically in the -main intake passage is a spindle 19 which) is provided with a threaded upper end, the

threaded portion being provided with a tleadqivery steep pitch. Mounted on the spindle fdr rotation thereon is a governor element-18. This governor element has a bushing 20 screwed into its lower end and secured in a recess at the upper end of the governor .is a plug 21 having an internal :thread thereon to' cooperate with the threaded portion of the spindle 19. The bushing 2O seats'on a plug in the air inlet pipe, as

4shown in'Figure l, and such bushing may be adjusted 1n the governor element to reg-v ulate the normal position of suchelement when the associated engine is not running.

It will be noted on inspection of Figure 1 that in normal position that portion of the governor-element which isV of greatest crosssectional area occupies a position adjacent the fuel outlet nozzle. When the throttle 4 is opened the .suction of .the engine lifts the governor element to enlarge the main int-ake passageway until at maximum opening it occupies the position shown in dotted lines in Figure l. As the element rises it rotates, owing to engagement of the plug 21A with the threaded part of spindle 19 and this samearrangement acts somewhat in the manner of a dash pot and prevents 'fluttering of the governor element.

This governor element serves not only to control the area of y the intake passage, but also acts as a bai'le against which any unvaporized particles of fuel issuing from the nozzle may strike, thus assisting in breaking up such portions of the fuel as are not Vaporized in the flared nozzle outlet. A fuel supply pipe 22 is threaded Minto-the skirt-portion 2 of the carburetor body and communicates with the fuel supply chamber 23.-

From the foregoing'description, it will be apparent that the mode of operation is as 'follows Assuming that the carburetor is attached to-an internal combustion engine, the governor will normally rest in its lowermost position when the engine is idle. "As soon as the engine is started, the fuel passes from 4the fuel supply chamber, through the annular fuel inlet passage and is partially vapori-Zed as it passes through the widened fuel discharge nozzle, due to the partial vacuum therein. By manually rotating the meteringcone, more or less fuel will be fed into the mixing chamber of the carburetor.

l-Vhen the speed of the engine increases, there isa corresponding upward movement of the go-vernor, dependent entirely upon the speed of the engine. As the governor raises, a large passage is created through which the'mixture may pass. It will be seen on inspection of Fig. 1 that there will always be an unrestricted passage from' the discharge nozzle i to the inlet and intothe intake manifold.

The metering cone provides an eflicient and extremely gradual and sensitive feeding control of the fuel to the carburetor.

T he metering cone is connected so as to be operable from a point adjacent the steering mechanism. 'll'hen my carburetor is once attached to an engine, it will require no attention. after .being first adjusted.

Many minor changes in detail of construction may be resorted to without departure l from the spirit of the invention.

Having thus described my invention what 'I cla-im as new and desire to secure by Letters Patent of the United States is:

l. A carburetor comprising a main airA passage, a fuel inlet passage formedin the wall thereof and communicating with said air passage and a main fuel supply, said fuel inlet passage comprising an annular /fuel chamber extending circumferentially.around the lwall of the shell, the outlet of said fuel inlet passage being enlarged to form a vnozzle of greater cross sectional'area than' r the main portion of said fuel inlet passage, to provide a chamber in which the fuel is partially air in the mainair passage.

2. A carburetor comprising a main air passage, a fuel inlet passage formed in the wall thereof at an approximate angle of 8O degrees tothe horizontal and communi- 'vaporized beforemixing with thej`95 eating with said air passage'anda main` fuel supply, said fuelinlet passage comprising an annular fuel chamber extending circumferentially around vthe wall of the shell, a governor movable within the shell, the out-let vof said fuel passage being inwardly directed towards said governor and enlarged to form a nozzle o f greater cross sectional v area than the main' portion of' said fuel inlet' passage, to provide afchamber in which the fuel is partially vaporized before mixing with the passage. y l

3. A carburetor comprising a main air passage, a fuel inlet passage formed in the air in the main air wall thereof and communicating with said v air assage anda main fuel supply', said fue inlet passage comprising an annular fuel chamber extending circumferentially r passage, a' fuel inlet passage `formed the Wall thereof and communicating withl said air passage *and .a main -fuelsupply, ,saidy 'fuel inlet passage comprising an annular fuel chamber extending -circumferentially around the wall of the shell, the outlet of said fuel inlet' passage being enlarged.

to form a nozzle of greater cross sectional\ `Wallthereof at an approximate angle f 80 degrees to' the horizontal and communieating with' said air passage and a main fuel supply, said fuel inletpassage 'comprising an annular fuel chamber extending circumferentially aroundv the; wall of ,thel

- shell, a governor movable-within said shell,

l wardly directed towards said governor and the outlet'of said' fuel inlet passage beingin'- Aenlarged to 4form a nozzle of greater' cross sectional area' than -the main, lportion of said fuel vinlet` passage, and means for effecting an adjustment between the walls of Said A' fuel inlet; assage. f

v@A ear uretor comprising passage, a fuel inlet passage formedin the air passage and a main fuel supply, said fuel .inlet passage comprising an annular ','fuel chamber extending circumferentially .around the wall of the shell, a screw posi- "=tioned' centrally f said main .ail-,.pass'age, a cone-shaped. governor rotatably and verticall movable on saidl screw, the outlet of uel'fpassage being inwardly directed Sali. towards said lgovernor 'and enlarged'to V.form a nozzleof greater cross sectional area than the main portion ofsaid fuel inlet passage,

wall thereof and communicating with said a main air to provide 'a' chamber in 'which the fuel is a partiell vaporized before .mixing with the air in t e mainjair passage. In witness* whereof, I have signed ,m'y

'nam'e to the foregoing specification.

" SEBASTIN e.. BRI'NKMAN; j 

